package comday05.itheima01;

public class Demo02 {
    //main方法
    public static void main(String[] args) {
        System.out.println(4);

        for (int i = 0; i < 2; i++) {
            System.out.println(1);
            System.out.println(2);
            System.out.println(3);
        }



        System.out.println(5);
    }


}
